Well, OG 12 study plan would be a great topic, but you need to change its name to get the best result. The current one is awkward and redundant (sounds familiar?

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I am studying now for the GMAT as well. I started with Kaplan's verbal workbook, went through the rules and concepts and then proceeded to the OG. I have completed all the Sentence Corrections question and decided to do the following: I went again over the explanations of the questions I've got wrong and decided to memorize everything, but with the understanding so I don't forget it easily. It is crucial to keep
error log of questions you've got wrong and what type they were (rhetorical construction, logical predication etc.). It will show you your weaknesses and guides where you need most improvement. So, once you realize what your biggest weaknesses are, work on them by using other books and guides that have more explanations.
You can apply this rule to other verbal sections and math as well. I would like to see other people's strategies as well. I would also like to stress the importance of volume; you can find lots of free samples on this forum!
Also, if you decide to make a new topic about thus subject, please provide us with a link
Good Luck